/* === Variables (Light) === */
:root {
  --bg: #FAFAF7;
  --text: #1A1A1A;
  --text-secondary: #5A5A5A;
  --accent: #8B6F47;
  --border: #E5E2DB;
  --serif: 'Cormorant Garamond', Georgia, serif;
  --sans: 'Inter', system-ui, sans-serif;
  --max-width: 1140px;
  --section-pad-v: 80px;
  --section-pad-h: 24px;
  --nav-h: 64px;
}

/* === Dark Mode === */
[data-theme="dark"] {
  --bg: #141412;
  --text: #E8E6E1;
  --text-secondary: #8A8680;
  --accent: #C49A6C;
  --border: #2C2A28;
}

/* === Reset === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s ease, color 0.25s ease;
}

/* === Skip link === */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  z-index: 9999;
  border-radius: 0 0 4px 4px;
  text-decoration: none;
}
.skip-link:focus { top: 0; }

/* === Container === */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--section-pad-h);
}

/* === Typography === */
h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 300;
  line-height: 1.2;
  color: var(--text);
}
h1 { font-size: clamp(2.2rem, 5vw, 4rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.5rem); margin-bottom: 0.5em; }
h3 { font-size: clamp(1.2rem, 2vw, 1.7rem); }
p { color: var(--text-secondary); }

/* === Links === */
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* === Dividers === */
hr.hairline {
  border: none;
  border-top: 1px solid var(--border);
  margin-block: 3rem;
}

/* === Fade-in === */
.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* === Sections === */
section {
  padding-block: var(--section-pad-v);
  border-bottom: 1px solid var(--border);
  scroll-margin-top: var(--nav-h);
}

/* === Section label (eyebrow) === */
.section-label {
  display: block;
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 2rem;
}

/* === Header / Nav === */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 247, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
  transition: background 0.25s ease, border-color 0.25s ease;
}
[data-theme="dark"] #site-header {
  background: rgba(20, 20, 18, 0.95);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: 0.04em;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* === Nav controls (lang + dark toggle) === */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.dark-btn {
  background: color-mix(in srgb, var(--accent) 10%, var(--bg));
  border: 1.5px solid var(--accent);
  color: var(--accent);
  cursor: pointer;
  border-radius: 8px;
  transition: color 0.2s, border-color 0.2s, background 0.2s, transform 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 40px;
  padding: 8px 14px;
}
.dark-btn svg {
  width: 18px;
  height: 18px;
}
.dark-btn:hover {
  color: #fff;
  border-color: var(--accent);
  background: var(--accent);
  transform: scale(1.05);
}
.dark-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.dark-btn:active {
  transform: scale(0.97);
}
/* Sun shown in light, moon in dark */
.icon-sun { display: flex; }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: flex; }
.dark-label {
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.1em;
}

/* === Burger === */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}
.burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.3s, opacity 0.3s;
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* === Hero === */
#hero {
  min-height: 100svh;
  display: flex;
  align-items: stretch;
  padding-block: var(--section-pad-v);
}
.hero-inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 3rem;
  width: 100%;
}
.hero-tagline {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  color: var(--text);
  margin-top: 1.25rem;
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: 0.01em;
}
.hero-services {
  list-style: none;
  padding: 0;
  border-top: 1px solid var(--border);
  padding-top: 2rem;
}
.hero-services li {
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.8vw, 2.2rem);
  font-weight: 300;
  color: var(--text);
  line-height: 1.4;
  padding-block: 0.5rem;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s, padding-left 0.25s;
  cursor: default;
}
.hero-services li:hover { padding-left: 0.5rem; }
.hero-services a {
  color: var(--text);
  text-decoration: none;
  display: block;
  transition: color 0.2s;
}
.hero-services a:hover { color: var(--accent); }
.hero-services a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.hero-name {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
  letter-spacing: 0.03em;
}
.hero-title {
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

/* === Services (mobile-first: single column) === */
.services-intro {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin-bottom: 2.5rem;
  line-height: 1.85;
}
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.service-item {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: calc(var(--nav-h) + 1.5rem);
  box-shadow: -3px 0 0 0 transparent;
  transition: box-shadow 0.3s ease, background 0.3s ease;
}
@keyframes service-highlight {
  0%   { box-shadow: -3px 0 0 0 var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
  100% { box-shadow: -3px 0 0 0 transparent; background: transparent; }
}
.service-item.highlight {
  animation: service-highlight 1.5s ease-out forwards;
}
.service-item:last-child { border-bottom: none; }
.service-item h3 { margin-bottom: 0.3rem; }
.service-sub {
  margin-bottom: 0.75rem;
  font-family: var(--serif);
  font-style: italic;
  color: var(--text-secondary);
}

/* === IP Rights (mobile-first: single column) === */
.rights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.right-item {
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
}
.right-item:last-child { border-bottom: none; }
.right-item h3 { margin-bottom: 1rem; }
.right-item blockquote {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--text-secondary);
  font-weight: 300;
  line-height: 1.6;
  margin-bottom: 1rem;
  padding-left: 0;
  border: none;
}
.right-item blockquote cite {
  display: block;
  font-size: 0.82rem;
  font-style: normal;
  margin-top: 0.4rem;
  letter-spacing: 0.03em;
}

/* === About === */
.about-inner { max-width: 720px; }
.about-name { font-size: clamp(1.4rem, 3vw, 2.2rem); margin-bottom: 0.4rem; }
.about-title-line {
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}
.about-body { font-size: 1rem; line-height: 1.85; }

/* === Contact === */
.contact-block { max-width: 400px; }
.contact-name {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.contact-phone { margin-top: 1rem; font-size: 1rem; }
.contact-email { margin-top: 0.35rem; font-size: 1rem; }

/* === Imprint === */
.imprint-body { max-width: 720px; }
.imprint-block {
  padding-block: 1.75rem;
  border-bottom: 1px solid var(--border);
}
.imprint-block:last-child { border-bottom: none; }
.imprint-block h3 {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.75rem;
}
.imprint-block ul {
  padding-left: 1.2rem;
  margin-top: 0.5rem;
}
.imprint-block li { color: var(--text-secondary); margin-bottom: 0.3rem; }
.imprint-block p + p { margin-top: 0.75rem; }
.imprint-block strong { color: var(--text); font-weight: 500; }

/* === Footer === */
footer {
  border-top: 1px solid var(--border);
  padding-block: 1.75rem;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-start;
}
.footer-copy { font-size: 0.78rem; color: var(--text-secondary); }
.footer-imprint { font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; }

/* === Back to top === */
.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, color 0.2s, border-color 0.2s, background 0.25s;
  z-index: 99;
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}
.back-to-top:hover { color: var(--accent); border-color: var(--accent); }
.back-to-top:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* =====================
   TABLET  (≥ 640px)
   ===================== */
@media (min-width: 640px) {
  :root {
    --section-pad-v: 100px;
    --section-pad-h: 36px;
  }
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* =====================
   DESKTOP  (≥ 900px)
   ===================== */
@media (min-width: 900px) {
  :root {
    --section-pad-v: 120px;
    --section-pad-h: 48px;
  }
  body { font-size: 17px; }

  .burger { display: none; }
  .nav-links {
    position: static !important;
    display: flex !important;
    flex-direction: row;
    background: none;
    border: none;
    padding: 0;
  }

  /* Services 2-col */
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .service-item { padding: 2.5rem 0 2.5rem 3rem; }
  .service-item:nth-child(odd) {
    padding-right: 3rem;
    border-right: 1px solid var(--border);
  }
  .service-item:nth-child(even) { padding-left: 3rem; }
  .service-item:nth-last-child(-n+2) { border-bottom: none; }
  /* override last-child rule for 2-col */
  .service-item:last-child { border-bottom: none; }

  /* IP Rights 2-col */
  .rights-grid { grid-template-columns: repeat(2, 1fr); }
  .right-item { padding: 2.5rem 0; }
  .right-item:nth-child(odd) {
    padding-right: 3rem;
    border-right: 1px solid var(--border);
  }
  .right-item:nth-child(even) { padding-left: 3rem; }
  .right-item:nth-last-child(-n+2) { border-bottom: none; }
  .right-item:last-child { border-bottom: none; }
}

/* === Mobile nav dropdown (< 900px) === */
@media (max-width: 899px) {
  .burger { display: flex; }
  .dark-label { display: none; }
  .dark-btn { padding: 8px; min-height: 36px; }
  .nav-links {
    display: none;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 24px 1.25rem;
    z-index: 99;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding-block: 0.65rem;
    font-size: 0.88rem;
    border-bottom: none;
  }
}

/* === Print === */
@media print {
  #site-header,
  .back-to-top,
  .nav-controls,
  .burger,
  .skip-link { display: none !important; }
  body { font-size: 11pt; color: #000; background: #fff; }
  a { color: #000; text-decoration: underline; }
  section { border: none; padding-block: 1.25rem; break-inside: avoid; scroll-margin-top: 0; }
  .fade-in { opacity: 1 !important; transform: none !important; }
  .services-grid,
  .rights-grid { grid-template-columns: 1fr; }
  .service-item,
  .right-item { border-right: none !important; padding-left: 0 !important; padding-right: 0 !important; }
}